1907 Hotel Imperial Frohner Posted byWebmaster March 17, 2017July 16, 2020 Year 1907. 18-07-1907 Letter to Alma Mahler (1879-1964). Related posts: Mahler Festival 1920 Amsterdam Anna Justine Mahler (Gucki) (1904-1988) Gustav Mahler’s Legacy Gustav Mahler-Alfred Rosé Collection – Inventory Year 1886 Year 1887